Floral Stripped Lace Plunge Teddy in Periwinkle Blue - Deep Plunge. Available in sizes 1x to 4x.  Designed by Oh la la Lingerie. If you are tall (over a 5'4" tall let's say) I would size up for a little more length and stretch. 

A 4x will likely fit a babe who wears a size 22/24.